LibreELEC often freezes on LiveTV start

Hello,

for a long time I have been using LibreELEC in a simple "one box" HTPC setup (see below). In the past there had been sporadic system freezes when starting Live TV, but I see them more frequently with recent versions: With LibreELEC 9, in 30%-40% (!) of all boot events my system freezes on activating Live TV, and I have to disconnect the power supply to reboot. Usually the second boot then comes up fine, and Live TV runs and remains 100% stable for hours.

Normally I have LibreELEC configured to go to Live TV right after boot. In case of freeze, I see the channel's name and a little "play" triangle on the top of the screen, but no Live TV. For testing, I configured the system for standard startup (no Live TV), but then it freezes the moment when activating Live-TV manually. In both cases Kodi's GUI remains responsive as long as you don't touch the Live-TV tab. This is strange and happens far too often.

Is someone out there who can help me? What should I do to find the problem?

Thank you very much!

-----------------

HTPC System setup:

CableTV--->(DVB Stick)---USB--->(INTEL NUC)---HDMI--->(Receiver)---HDMI--->(Projector)

(DVB Stick): Hauppauge win-TV Dual HD

(INTEL NUC): DN2820FYKH , LibreELEC 9.2.2 + Tvh 4.2.8-36 + addon v9.2.0.121

(Receiver) : Pioneer VSX S520D

(Projector): EH-TW6700W

Hello,

Nicolas: I did nothing of the above. If LibreELEC freezes, it does so at the Moment when Live TV is activated. This won't happen every time: in 60-70% of all boots my System runs as expected.

The last Freeze occurred last night (2020-04-22 , time ca. 22:41) and I was able to get the logfiles. From the files I cannot see what might have caused the Freeze, so I attach them to this post. Maybe someone can look into the data and see what is going wrong.

Thank you very much.

Hello,

ad 1: Automatic update is enabled. Therefore, I expect the latest versions (Version info: see first post)
ad 2: No. Can I do this from LibreELEC's menu? Where?
ad 3: passthrough is enabled for AC3.
ad 4: deinterlacing + scaler Settings? Where do I find them? (I'm using 1920x1080@50p, which fits the projector)

Let me know if you need more info.

Thank you very much!

Hello,

thank you, Nicolas!

ad 1: Manual update indicated that I was already using the latest Tvh Version 4.4.21.1 . Nevertheless, I manually reinstalled 4.4.21.1

ad 2: Done.

ad 3: Scaler = bilinear , Deinterlace = VAAPI-BoB (I am watching mostly German TV which comes in 720p)

Now I'm curious to see if #2 has any positive effect….

Hello Nicolas,

thank you very much.

Quote from Nicolas

German TV you should use a refresh rate of 50hz

Yes, this is what I use. (->third post pof mine)

Quote from Nicolas

But as you say the Problems came Up recently i would guess on RAM.

I have seen those freezes sporadically all the time. But recently they become more frequent. (->first post)

I am not sure if that the problem results from a bad RAM. If so, the whole System would be much more unstable and fail in random situations. Here, the failure ONLY occurs when trying to activate Live TV.

Quote from Nicolas

If you Set a 5 Second wait for the tvh

I will try this, but I doubt it will help. For testing, I configured my System not to go to Live TV after boot, which introduces sort of a "Manual delay", as Live Tv has to be activated manually. This did not improve anything. (->first post)

Last night, I had another Freeze after applying all above Actions. The log files are attached.

Can something be found in the data?

Hello Nicolas,

sorry for not posting anything over last weekend…

I deinstalled mediaview and replaced it by two different addons (ARD Mediathek and ZDF Mediathek, from official libreelec repositories). Now I will watch if my System gets more stable. This should take a few days.

I will keep you informed.

Hello,

I'm back, sooner than expected: Last night I saw one more Freeze, i.e. the Actions above didn't help. Logfiles are attached.

It went the typical way: I cold booted my System, then navigated to the Live TV tab, then pressed OK, then the System stalled.
Since my HTPC is connected to LAN, I tried to Access it (while stalled) from a remote Computer:
- the System was accessible via LAN, and I was able to retrieve the error logfiles (attached)
- Tvheadend addon's configuration page was reachable too and seemed to be functional

From the above I assume that Libreelec's GUI crashes.

How should I go on to find the Problem? Any Ideas?

Thank you very much!

Hello,

thank you, Nicolas.

Quote from Nicolas

Mediathekview 062 is still in your logs and Returns Errors.

Oh, that is strange…

I will do a complete reinstall then. Something for the upcoming Holidays....

Quote from Nicolas

Thumbnail cleanup

What is that? And how is it done?

Thanks and best regards
Michael

Hello Nicolas,

just to let you know: There was no more Freeze since I made the Fresh install last Thursday (I only backed up + reinstalled Tvh settings).

It seems that my System suffered from "leftovers", so I will install the "profile cleaner" as you advised.

Once again, thank you very much!

Michael